Paper box or carton



April 9, 1935. s. KATz PAPER'BOX OR CARTON l Filed Nov. 22, 1933Patented Api-.9,1935 p f `1,997,523

` r 'Parannox on calrroN l Y samuerxm, New York, N. Y., assigaor ,mi Gi-...fme e braltar Corrugated Paper Co. Inc. North` Bergen, N. J., acorporation of New Jersey Application November-22,1933, seriaiNotssazvzzclaims. `(ci. 229-34) 'I'his invention relates to improvements inrugations extend vertically in these parts when paper boxes or cartons,and has more particular the box is formed. g relation to boxes orcartons, of the so-called Each of the locking flaps I3 is formed on itsknck-down type usually constructed of paperouter edge with two lockinglugs I4. The ap I3 `5 board, either plain or corrugated. Y, is slightlyless in width than the end I2 so that 5 The principal object of theinvention is to form this nap may double down insidev of the sides I6the body of the box or carton of cardboard so when the box is assembledand as shown in scored and constructed that when assembled,the Figure 1.l l parts will be automatically locked in position At the points marked2 and3 the blankisscored 10 `against accidental'displacement, but at thesame between each endl I2 and its companion locking 10 time, be capableof being knocked-down for ap, I3; the distance between the scores2and 3Shipping. g egnalling the thickness of the end flaps II which A furtherobject of theinvention is to provide extend between their respectiveends I2 and the a boxor carton of corrugated paper capable of lockingflaps I3 that double down inside of them being knocked-down for shippingand having when the sides of the box have been raised to posi- 15` itsparts locked in position when assembled. tions at right angles to thebottom II. The end `Another object of the invention is to provide flapsI1 are connected to the sides I6 and are a box struck from a singlejblank of corrugated scored asat 4 and 5 so that these end flaps maypaper in which the boxmay be held in its asbe doubled inward along thescored lines. The

10 sembied condition by end naps which automatnaps n are s1ignt1y1ess inheight than thesides 20 ically l'ock with slits formed in a portion ofthe I6 toallowaclear space I9 for accommodating the corrugated paper.`bend of the end apsIZ and I3 when the box is 'I'he invention also hasother objects, all of assembled. which will be hereafter moreparticularly set Scored lines l are formed between each end UNITED i,STATES y PaJIFENTfol-FICE- forth and claimed. of the bottom and its endflap i2. The paper layer 25" In thedrawing forming part of the specica-26 of the bottom is slit as at I5 at each end. This tion, i slit onlyextends through the Apaper 26 and a por- Figure 1 represents aperspective view of a box tion of the corrugated paper 20 so that whenthe embOdl/ing mynventiOn, the Same being partly locking nap -l3 isdoubled over the flap I] and broken away to expose the interior and thecover 'forced into a vertical position as shown in Figure 30 and endsbeing shown in dotted lines. 1, the locking projections Il will depressthe paper Figure 2 represents a detail vertical section `oi 26 againstthe yielding pressure of the corrugathe Same 0n the line 2-2`0fFigure 1. tions 20 until these lugs pass the` slits I5, when Figure 3represents an end elevation broken the paper 26 will be again forcedupward by the 35 away and showing the locking construction of springofthe corrugations 20 and lock the lugs 35 the end flaps, and l d firmlyin position as shown in Figure 2. When Figure 4 represents a top planview of one end locked in :this position the lower end of theI flap ofthe box blank, the opposite end being broken I3 and the lugs Il are heldfirmly in position as away. the forcing down ,of the paper 26 is againstthe 'J Describedin general terms, the. box, which is spring tension ofthe corrugations and thesecor- 40 formed from a single blank ofcorrugated paper, rugationsby their tendency to resume theirnorcomprises a bottom II, sides I6, end flaps I1, mal positions exertconsiderable friction onthe ends I2, locking flaps I3 and a cover 25.The lower end of the locking lugs I4 and as these lugs cover '2.5 may beof any ordinary construction cannot lmove upward and have a tendency toarranged to t over the box proper, andforms spring forward, the lips I3are` locked rmly no part of the present invention. y Yagainstanyaccidentaldisplacement.

The paperk from which the box is constructed Thislocking effect isaccomplished by pushing COmDIiSeS an inner layer 0f Papel' 26, an outerthe flap along the upper surface of the paper 26 0 layer 21 and anintermediate corrugated or by employing force and until the lugsIl snapinto 50 waved strip 20, as best shown in Figure 3. position as abovedescribed.

The corrugations 20 extend longitudinally of After being so locked inposition the flaps I3 the bottom II for a purpose to be hereinafterdecannot again be drawn forward into the box exscrlbed and as the endsI2 and the lockingflaps cept by employing some tool to depress the bot-I3 form an integral part or the bottom, the cortom and disengage thewalls of the slots I5 from a It will be seen from the above that thebody ofi?,

this box or carton is struck from a single piece of material and hasgreat rigidity because of the corrugated construction and thattheblanksmay be shipped in a flat condition in very small packages andmay be instantly erected into rigidboxes' locked in the most positivemanner in their assembled condition. Ordinary strainsI and packing ofsuch boxes or cartons will have no eiIect on the structure of the boxessuch as might disengage the locking' aps I3, as these aps, together withthe aps I1 and the end l2, form a rigid unyielding structure in whichthe lugs I4 cannot be forced out of engagement with the walls ot theslits I5 except by deliberate intent.

What I claim is:

1. Ina collapsible box, the combinationwith a single paper blank havinga bottom. section comprising a slit dat bottom layer and cox'npressiblecorrugations connected below the same, side sectionshaving naps at eachend, endv sectionalocir-` ingr apsconnectedto the end sections andhaving locking projections that' engage the slits ixr the bottom andpartly compress the corrugati'ons which're-act to hold the locking napsrmly in lockingvposition.

2. In a, couapsible box, me combination with' a single paper blankhaving. a bottomv section composed of flat top and bottomV layersspacedv and separated by wave-like corrugations, the top layer onlyhaving locking slits therein, side sectionshaving flaps at each end,vend sections and lock ing iiaps having locking tongues which engage thewalls of the` slits in the bottom and partly compress the corrugationswhich re-act to hold the tongues ilrmly in locking positions.

SAMUEL KATZ.

